Scheduled Downtime

I'd like to be able to specify a time in the future for when scheduled maintenance to occur. I'd want it to automatically switch to a status message at a given time. Perhaps this would work best with the upcoming version based on the github API.

The issue names no files, tests, or entry points, so first inspect how the project generates status messages and whether it has a GitHub API integration. Define how a future maintenance time is configured and verify that the generated status automatically switches at that time.

Written by the indexing model from the issue text.